In 1 BBY, The Empire created a vast number of war droids with fire and ice attachments. Several of these were utilized on the village of Rhador, encasing several people in carbonite vapor and instantly freezing them, and then proceeding to wipe out the entire village. These were then used as combat units for defense on Kamino, Cato Neimodia, and in ambushing the Salvation on the Battle near the Itani Nebula. However, none of the Carbonite war droids were used in attacking the said battleship. A clone of Galen Marek encountered and destroyed several carbonite war droids on Kamino, and in Cato Neimoidia by ripping off their shields with the Force and utilizing their own weapons against them, making them freeze into a statue which could easily be disintegrated by Force push.

In 1 BBY, the clone of Galen Marek had encountered several Incinerator war droids on Kamino. Some of these droids also joined the invading Imperial forces on the Nebulon-B Frigate Salvation above Kamino, some of which also being used to fry the communications equipment onboard the Salvation before the clone destroyed them in an attempt to re-establish the communications with the Rebellion. The droids were an advancement to the Carbonite war droid, but they were developed to house a Flamethrower in their "arm" instead of a frozen Carbonite gun.

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